Identifying Kinetic Sunyaev-zeldovich Effect In X-ray Clusters

Details Identifying Kinetic Sunyaev-zeldovich Effect In X-ray Clusters Identifying Kinetic Sunyaev-zeldovich Effect In X-ray Clusters

Feb 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010head...11.3423k&link_type=abstract

American Astronomical Society, HEAD meeting #11, #34.23; Bulletin of the American Astronomical Society, Vol. 41, p.714

Astronomy and Astrophysics

Astrophysics

Scientific paper

For clusters of galaxies, their peculiar velocities can be measured from the kinematic component of the Sunyaev-Zeldovich (SZ) effect produced by Compton scattering of cosmic microwave background (CMB) photons off the hot intracluster gas. I will discuss results from measurements of the large scale peculiar flows using a large X-ray cluster catalog composed for this purpose and all-sky CMB maps from the WMAP satellite. The results cast doubt that the gravitational instability from the observed mass distribution is the sole - or even dominant - cause of the detected motions. Instead it appears that the flow extends across the observable Universe.
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Kashlinsky, A., Atrio-Barandela, F., Ebeling, H., Edge, A., & Kocevski, D. 2009, ApJ, submitted (arxiv:0910.4958)

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